Simultaneous evidence for a new species of Torrenticola Piersig, 1896 (Acari, Hydrachnidia) from Montenegro Author Pešić, Vladimir Author Valdecasas, Antonio G. Author García-Jimenez, Ricardo text Zootaxa 2012 2012-10-12 3515 38 50 journal article 10.11646/zootaxa.3515.1.2 30c37a4f-42a2-43fb-9389-1bf52f3346e9 1175-5326 282580 6538EE39-26AA-4820-9A66-A23926FE3ACE Torrenticola lukai sp. nov. ( Figs. 1–3 , 7A,C , 8A,C , 9A,D ) Torrenticola lundbladi Pešić, 2004 , nec K. Viets, 1930 Type material . Holotype male ( NHMB ), dissected and slide mounted, Montenegro , stream Mrtvıca near village Velje Duboko ( 42°46'47''N , 19°16'56''E ; 820 m a.s.l.), 13.viii.2010 . Paratypes : 9/4/0, same data as holotype , 2/2/0 (mounted); 4/1/0 in voucher collection for molecular study . Further records. Montenegro : stream Mrtvica near village Mrtvo Duboko ( 42°43'N 19°21'E , 600 m a.s.l.), 11.vii.1999 , Pešiċ “ Torrenticola lundbladi ” 2/0/0 (mounted) ; Komovi Mt., river Opasanica near Opasanica village ( 42°40'38''N , 19°32'40''E ; 1130 m a.s.l.) 12.viii.1998 , Pešiċ “ Torrenticola lundbladi ” 1/0/0 (mounted) ; ibid., 15.viii.1999 , Pešiċ “ Torrenticola lundbladi ” 1/2/0 (mounted) ; stream Bistrica near Crkvine village ( 42°48'N , 19°27'E ; 1122 m a.s.l.), 15.ix.2004 2/0/0 (mounted). FIGURE 1A–B . Torrenticola lukai sp. nov. , male: A = dorsal shield; B = ventral shield. Scale bar = 100 µm. Diagnosis. Idiosoma large in size (L 850–1050 in males, 1000–1200 in females); shoulder platelets fused to dorsal plate, but suture line visible; area of primary sclerotization of the dorsal plate with two dorsoglandularia; posterior suture line of Cx-4 partly distinct; postgenital area large; excretory pore and Vgl–2 posterior to the line of primary sclerotization; distal margins of P-2 and -3 without denticles, ventral protuberance of P-4 unpaired, with one longer, and three shorter hairs; capitular rostrum relatively short and deep (L/H ratio 1.2–1.4). Male: median suture line of Cx-2+3 relatively long (140–160, L ratio Cx-1/Cx-2+3 2.1–2.5), genital field rectangular in shape. FIGURE 2A–G . Torrenticola lukai sp. nov. , (A–F male, G female): A = palp, medial view, B = palp, lateral view; C = ejaculatory complex (non-mounted), D = capitulum and chelicera; E = capitulum, F–G = anterodorsal portion of ventral shield. Scale bars = 100 µm. Description. Male ( holotype , in parentheses measurements of the paratypes , n = 2): Idiosoma (ventral view: Fig. 1B , 8A ) L 969 (881–1018), W 760 (681–775); dorsal shield ( Fig. 1A , 7A ) L 850 (738–838), W 630 (563–668), L/W ratio 1.35 (1.26–1.31); dorsal plate 791 (694–794); frontal platelets L 181–183 (159–187), W 76–77 (63–75), L/W ratio 2.38 (2.48–2.6); capitular bay L 156 (130–159); Cx-1 total L 366 (309–367), Cx-1 mL 209 (178–208), Cx-2+3 mL 145 (140–145); ratio Cx-1 L/Cx-2+3 mL 2.52 (2.2–2.53); Cx-1 mL/Cx-2+3 mL 1.44 (1.28–1.43); genital field L/W 168 (152–169)/140 (122–145), L/W ratio 1.2 (1.17–1.25); ejaculatory complex as in Figure 2C , L 206 (205–260); distance genital field–excretory pore 191 (175–222), genital field–caudal idiosoma margin 278 (275–319); capitulum ( Fıg. 2D–E , 9D ) vL 294 (268–300); chelicera total L 361 (329); palp ( Figs. 2A–B ): total L 350 (300–345), dL: P-1, 43 (38–42); P-2, 109 (95–109); P-3, 69 (60–67); P-4, 109 (88–105); P-5, 20 (19–22); P-2/P-4 1.0 (1.04–1.08). Female ( paratypes , n = 2): Idiosoma (ventral view: Fig. 3 , BC) L 1075–1100 , W 850–900; dorsal shield ( Fig. 8C ) L 916–988, W 715–725, L/W ratio 1.28–1.36; dorsal plate 853–913; frontal platelets L 190–203, W 78–92, L/ W ratio 2.07–2.52; capitular bay L 144–153; Cx-1 total L 370–383, Cx-1 mL 225–229, Cx-2+3 mL 45–52; ratio Cx-1 L/Cx-2+3 mL 7.37–8.2; Cx-1 mL/Cx-2+3 mL 4.4–5.0; genital field L/W 228–231/198–200, L/W ratio 1.14–1.17; distance genital field–excretory pore 269–284, genital field–caudal idiosoma margin 413–417; capitulum ( Fig. 9A ) vL 316; chelicera total L 375; palp: total L 350–370, dL: P-1, 44–49; P-2, 109–115; P-3, 68–72; P-4, 108–114; P-5, 20–21; P-2/P-4 ratio 1.01 (1.01). FIGURE 3 . Torrenticola lukai sp. nov. , female: ventral shield. Scale bar = 100 µm. Discussion. Pešiċ (2004) reported from northern Montenegro the presence of Torrenticola lundbladi ( K. Viets, 1930 ) , a species hitherto known only from Spain ( K. Viets 1930 , Lundblad 1956 ). The specimens closely resemble the latter species due to the longer medial suture of Cx-2+ 3 in male, a similar shape of ejaculatory complex and the rectangular shape of the male genital field ( Pešiċ 2004 ). However, from a re-examination of the specimens in question and the study of newly collected material resulted fundamental differences, showing that populations from Montenegro , here described as T. lukai sp. nov. , are not conspecific with T. lundbladi . Namely, as showed by Lundblad (1956) , and confirmed by our new material from Spain , T. lundbladi clearly differs from the specimens from Montenegro in a longer and more slender capitular rostrum (compare Figs. 2D, E , 9A, D with 5D, F, 9B–C, E–F). Further differences include the indistinct posterior suture line of Cx- 4 in T. lundbladi . Pešiċ et al. (2007) stated that the similar shape of ejaculatory complex and rectangular shape of the male genital field of the specimens from Montenegro indicate a close relationship to Torrenticola lesbica Di Sabatino & Gerecke, 2003 , described from the island Lesbos, Greece ( Di Sabatino et al. 2003 ) and later reported from the Eastern Black Sea coast of Turkey ( Pešiċ et al. 2007 ) and Macedonia ( Pešiċ et al. 2007 ). The latter species (in the following in the parentheses, data taken from Di Sabatino et al. 2003 and Pešiċ et al. 2007 ) can be distinguished from T. lukai sp. nov. in a shorter median suture line of Cx-2+ 3 in males (94–100, L ratio Cx-1/Cx-2+3 2.8–3.2), and a slightly less enlarged idiosoma in both sexes ( 750–850 in males, 850–950 in females). Etymology . The species is named after Luka Pešiċ, an in 2012 two-year old son of the first author. Habitat. Rhitrobiont; middle-order streams at elevation above 500 m a.s.l. ( Fig. 4 ), preferably in riffle areas. Distribution . Montenegro .